Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b8daa4e885731c…

MALICIOUS

PDF

33.7 KB Created: 2020-08-14 19:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47130e9bbaf8bea3bfe31fdefea161da SHA-1: f39895b2c872e6715ba152319c0e4fd0bea3d92a SHA-256: 03b8daa4e885731ce3aae71487062e260be90b10c4fc2b78f5493e667d8c486a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'parts manual' and the malicious URL, suggesting a lure. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the redirection heuristic indicate an attempt to lead the user to malicious infrastructure, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=marley+cooling+tower+parts+manual
    • http://files.hemp-aura.com/uploads/1/3/1/4/131437157/374289538a36e.pdf
    • http://files.readitglobal.com/uploads/1/3/1/4/131409463/mawokena-volokodajilaze-zidojufibevala-jaxepizad.pdf
    • http://gonew.churchofthewild2rivers.com/uploads/1/3/0/9/130969352/zijojogoxer-zasubifef.pdf
    • http://paroboj.joannaruhl.com/uploads/1/3/0/7/130775129/346954.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2886/3397/files/veneduwixewusika.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/jumupe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/tinker_tailor_soldier_spy_screenplay.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/83635821058.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/present_perfect_already_yet_just_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9571/files/futuvaxavujalixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/beneguridosobekew.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/97570356806.pdf
    • https://cdn.shopify.com/s/files/1/0435/8642/0893/files/couper_page_par_page.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045d7.bin
616c40ba84e670d4ddac7b0f7fad86ea42aa29ce83406351786730f349406a12
pdf-font-stream PDF embedded font (sfnt) at offset 0x45D7 5452 bytes
font_01_sfnt_off0000586e.bin
7f31a807e1564868ba3814136c8984c16b3a72c74780c2bfbbae0a9e0b4247ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x586E 9864 bytes